股票交易模拟器,用户拥有起始资金10000美元，用于购买或售卖自己的股票，三个虚拟的公司发行不同的股票，每当用户交易完后，股票票价会改变。-This program is designed to mimic stock trading. Users can purchase or sell stocks of three different virtual companies. The prices of the stock change at the end of the day.